Agree with Moosehead.
I used these, 2.75" SSTC-70-78:
https://www.amazon.com/gp/product/B0058W7WK6/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
I used these, 2.75" SSTC-70-78:
https://www.amazon.com/gp/product/B0058W7WK6/ref=oh_aui_search_detailpage?ie=UTF8&psc=1